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National Geologic Map Database

Geologic Unit: Shriver

Usage:

Shriver Chert of Oriskany Group (MD*,PA*,WV*,NJ)
Shriver Chert (MD*,WV*)
Shriver Chert Member of Oriskany Formation (MD,PA)
Shriver Formation of Helderberg Group (WV)
Shriver Formation of Oriskany Group (PA*)
Shriver Member of Old Port Formation (PA*)


Geologic age:

early Early Devonian (Lochkovian)*


Type section, locality, area and/or origin of name:

Type area: Shriver Ridge at Cumberland, Allegany Co., MD (Swartz and others, 1913).


AAPG geologic province:

Appalachian basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).